package com.atguigu.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginFilter implements Filter {

	@Override
	public void init(FilterConfig filterConfig) throws ServletException {
		// TODO Auto-generated method stub

	}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
			throws IOException, ServletException {
		HttpServletRequest httpRequest = (HttpServletRequest) request;
		HttpServletResponse httpResponse = (HttpServletResponse) response;
		Object user = httpRequest.getSession().getAttribute("user");
		if(user == null) {
			httpRequest.getRequestDispatcher("/pages/user/login.jsp").forward(httpRequest, httpResponse);
		}else {
			chain.doFilter(httpRequest, httpResponse);
		}
	}

	@Override
	public void destroy() {
		// TODO Auto-generated method stub

	}

}
